Edwards EST SIGA-PHCD Intelligent MultisensorNOTE: This part is discontinued by the manufacturer. Replace with: SIGA OSHCD. The Edwards EST SIGA PHCD is an intelligent addressable multisensor detector for Signature Series loops. It combines photoelectric smoke, rate of rise heat with a 135 F fixed threshold, and a monitored CO element for broad fire and CO coverage. On board processing with drift compensation and self checks helps cut down nuisance alarms, with selectable sensitivity (including
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